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Finding the Fourth Proportional to 387,251.44, 534,457.10 and 217,485.56

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Solution

The fourth proportional to 387,251.44, 534,457.10 and 217,485.56 is: 300,158.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,251.44 : 534,457.10 = 217,485.56 : x
  2. Step 2: Convert to fraction form
    387,251.44/534,457.10 = 217,485.56/x
  3. Step 3: Cross multiply
    387,251.44x = 534,457.10 × 217,485.56
  4. Step 4: Simplify right side
    387,251.44x = 116,236,703,569.33
  5. Step 5: Solve for x
    x = 116,236,703,569.33/387,251.44
  6. Step 6: Final answer
    x = 300,158.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.